Qalvin brings power meter zeroing, diagnostics, calibration changes and firmware upgrades to Windows and Mac computers. Qalvin is also available for iPhone and Android.

Qalvin for Windows and Mac requires an ANTUSB2 or ANTUSB-m stick. The Qalvin iOS app requires a Wahoo Key.

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For bike shops: Qalvin is the fastest way to confirm operation at installation time. Instantly on and easy to pair – you can search for and select a power meter or key in the ANT+™ ID. Set the zero offset. View power, cadence and crankset revolutions.

For coaches and mechanics: Qalvin is a digital wrench set. Check battery voltage. See the last zero offset. Set zero offsets on multiple bikes quickly and easily.

For support: Qalvin keeps you up-to-date and informed. Install power meter firmware. Run advanced diagnostics to check power meter health. Change the power meter’s slope using the built-in calibration routines.


Qalvin is Quarq’s app for power meter zeroing, diagnostics, firmware upgrades and calibration. We originally developed Qalvin so first and second generation power meters could be calibrated in the field. OmniCal™ removes the need for recalibration, but Qalvin remains indispensable for shops, mechanics, teams and athletes, and anyone seeking the latest firmware version or enhanced information for their power meter.

1. Qalvin for Windows and Mac requires an ANTUSB2 or ANTUSB-m stick. Most ANT+™ USB sticks that come with Garmin fitness watches are compatible with Qalvin. Note: Qalvin and the Garmin ANT Agent™ cannot use an ANT+ USB stick at the same time. Close one program to use the other.

2. The Qalvin iOS app requires a Wahoo Key. This is an ANT+™ transceiver that plugs into an iPod Touch, iPhone or iPad. On Apple’s latest devices – those with a Lightning connector – you must use a 30-pin to Lightning adapter with the Wahoo Key.

3. First and second generation power meters include the Quarq CinQo, CinQo Saturn, Saturn2 and Quattro MTB; SRAM S975 and S2275 MTB.

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